The Red Dot Frame Filter 78R5361M - RD-5-9234-1P features a dimension of 17" x 4-1/2" x 1/4". This model may be used with models R-6120-0, R-6120-1, R-6120-2, R-6120-10 and R-6120-11 and Gilligan models 21-43550 and 21-55565.